Elevator.



No. 794.293. PATENTED JULY ll, 1905. MOCLELLAN FULLBNLOVE.

ELEVATOR.

APPLICATION I'ILBD AUG. 4, 1904,

2 SHEETS-SHEET 1.

- 927@ @W6/TMW No. 794,293. PATENTED JULY 11, 1905.

MOCLELLAN PULLBNLOVB.

ELBVATOR.

APPLICATION FILED AUG. 4. 1904.

2 SHEETS-SHEET 2.

WJTNESSES- NiTnD STATES Patented July 11, 1905.

PATENT Fries.

MCOLELLAN FULLENLOVE, OF LOUISVILLE, KENTUCKY, ASSIGNOR OF ONE-HALF TOOLINT C. MCCLARTY, OF LOUISVILLE, KENTUCKY.

ELEVATOR.

'SPECIFICATION forming part of Letters Patent No. 794,293, dated July11, 1905.

Application iiled August 4,1904. Serial No. 219,507.

To (LZZ whom, it may con/cern:

Be it known that I, MCCLELLAN FULLEN- LOVE, a citizen of the UnitedStates, residing at Louisville, in the county of Jefferson, State ofKentucky, have invented certain new and useful Improvements inElevators, of which the following is a specification.

This invention relates to elevators; and it has for an object to providean improved brake that may be operated by hand or that will be operatedautomatically when any one of the doors at any of the landings is openor when the elevator-cage travels at too great a spee Other and furtherobjects will appear in the following description and will bemoreparticularly pointed out in the claims.

In the drawings, Figure 1 is a vertical ele vation of a section of anelevator-shaft with a cage mounted therein, showing the position of thebrake and cushioning devices. Fig. 2 is a vertical section of oneembodiment of my invention in which the spiral is arranged on theinterior of a tube, whichis provided at its lower end with thecushioning device. Fig. 3 is a vertical section on a line 3 3, Fig. 2.Fig. 4 is a vertical section of another embodiment of my invention. Fig.5 is a vertical elevation ofthe traveling spiral shown in Fig. 4. Fig. 6is a vertical section of a portion of the elevator-shaft with the cagemounted therein in front of a landing, another embodiment of mybrake-operating mechanism be ing herein shown. Fig. 7 is a detail viewshowing the hand operating-lever projecting is position to engage thecam-face that is moved in its path by the door.

Referring more particularly to the draw-1 ings, 1 indicates anelevator-shaft, and 2 the cage traveling therein. I position on oppositesides of the cage a pair of fixed spirals 3, and between the upper beam4 and the lower beam 5 of the elevator-cage 2 I journal on oppositesides of the elevator and on vertical axes rotaryT spirals 6. Theserotary spirals 6 are formed at their lower ends with rounded bearings 7,which fit in bearingsockets 8 in the upper sides and near the ends ofthe lower beam 5. At their upper ends spiral an additional brake.

they are formed with conical bearing ends 9, which are normally spacedfrom conical bearing-sockets 10 in the under sides and near the ends ofthe upper beams 4 of the cage 2. This spacing of the upper ends from theupper beam permits of a slight axial movement of the spirals 6 relativeto the cage 2, so that when the cage exceeds the speed of the spirals inits downward movement the upper conical ends of the spirals frictionallycontact with the Walls of the conical socket 10 and produce a brakingeffect upon the traveling spirals, thereby preventing or retarding theirrotation, and consequently the movement of the elevator-cage. Inaddition to this automatic braking means I provide for each travelingThis additional brake consists of a band 11, that is secured at one end12 to the elevator-cage and thence passed around a frictional surface 13on a traveling spiral 6 to a lever 14, pivotally connected at 15 to theelevator-cage.

In one embodiment of my invention the levers 14 of opposite travelingspirals depend below the cage and are connected by a horizontal swingingbar 16, that is operated by a lever 17, having a slotted connectiontherewith at 18 and pivoted at 19 to the .elevatorcage. This lever 17 ispositioned to one side of the door of the shaft-casing and is providedat its upper end with a hand-grip 20, by which it may be manuallyoperated. The lever is also provided with a projection 21, that extendsthrough the front wall of the cage and is employed for the purpose ofcausing the lever 17 to be shifted when the doors 22 of theelevator-shaft are open. This latter shifting is caused by a lever 23for each shaftcage door, pivoted at 24 to ,the shaftcage and provided atits lower end with a cam-face 25, which is thrown into the path of theprojection 21 when the adjacent door 22 is'open. A lever 26, alsopivoted to the shaft-cage, has a slotted connection 27 with the lever 23and is engaged at its lower end by a friction-roller 28 on the door 22to cause the lever 23 to be drawn into the path of the projection 21.

In the embodiment of my invention shown in Fig. 6 one of the levers 14is pivoted at its lower end at 29 to the bottom of the cage 2 andextends upwardly to a point near the top of the cage, where it isprovided with a lateral extension 30, which carries at its end avertical arm 31, having a cam-face similar to the cam-face 25. (Shown inFig. 1.) The other lever 14 in this embodiment is pivoted intermediateof its ends at 32 to the side of the cage 2 and is connected to thefirst-mentioned lever 14 by a link 33. When the door 22 is open, theroller projection 2la is in the path of the cam-face on the arm 31. Inboth embodiments upon the engagement of the cam-face on one part and theprojection on the other part the levers 14 are moved in a direction toapply both band brakes 11, whereby on the downward movement of the cagenot only is friction applied through the band 11 to the traveling spiral6, but the traveling spirals are retarded, thereby throwing the twofrictional surfaces 9 and 1() into engagement.

In the embodiment shown in Figs. 1 to 3 the fixed spirals 3 are fittedon the interior of tubes 34, which are provided with vertical slots 35,through which the beams 4 and 5 work, and the traveling spirals 6 areformed on the exterior of barrel 36. In the bottoms of the tubes 34 areformed air-cushion chambers 37, in which work plungers 38, With whichthe lower beam 5 contacts when it moves past a certain position, so thatshould the elevator drop or get beyond control there is no danger of itreaching the bottom of the shaft with a thump.

In the embodiment shown in Figs. 4 and 5 the fixed spiral 31'is formedby two intertwined cables, while the traveling spiral 6a is formed inthe center of a barrel 36a.

The operation of my invention is as follows: In the upward travel of thecage 2 when it is desired to stop the elevator the power is shut off andthe levers 14 either moved by hand or automatically, thereby applyingfriction to the traveling spiral 6 andv holding them against rotation,thus preventing the movement of the cage. In the downward travel of thecage the stopping at any landing is accomplished in the same manner asin the upward travel, and in addition on the braking of the travelingspiral the said spiral is caused to move relatively to the cage by beingretarded into contact with the frictional surface 10. If the cage shouldexceed the speed of the traveling spirals in its downward travel or dropin either direction of traveling, the frictional surfaces 9 and 10 willcome together, thereby preventing the rotation of the traveling spiral.The cushions on the sides of the cage are an additional preventionagainst serious accidents.

While I have shown and described several embodiments of my invention, Iwish it to be understood that I am not to be limited to theseembodiments, but that I may make various changes within the scope of theappended claims without departing from the spirit or sacrificing any `ofthe advantages of my invention.

Having thus described my invention, what I claim is- 1. In anelevator-brake, the combination with the elevator-cage, a vfixed spiral,and a spiral traveling with the cage and movable longitudinallyrelatively thereto to cause a braking action, of means for braking thetraveling spiral while the cage is connected to its hoisting mechanismto cause the longitudinal movement of the spiral.

2. In an elevator-brake, the combination with the elevator-cage, of aspiral mounted independently of the cage, a spiral traveling with thecage and on the other spiral and movable longitudinally relatively tothe cage to cause a braking action, and manuallyoperated means forcausing the longitudinal movement.

3. In an elevator-brake, the combination with the cage and a fixedspiral mounted independently of the cage, of a spiral traveling with thecage and on the fixed spiral, and means operated by an elevator-doorwhen open for braking the spiral traveling with the cage.

4. In an elevator-brake, the combination with the cage, and a fixedspiral arranged in the cage-shaft, of a spiral traveling on the fixedspiral with the cage and also movable longitudinally relatively to thecage, and a brake contacting with the traveling spiral when it movesaxially and a band-brake for the traveling spiral. i

5. In an elevator-brake, the combination with the cage, of a fixedspiral arranged within the elevator-shaft, a spiral traveling with thecage, on the fixed spiral, also moving longitudinally relatively to thecage and having its upper end provided with a braking-surface, and abraking-surface arranged on the cage, and manually-operated means forretarding the movement of the traveling spiral.

6. In an elevator-brake, the combination with the cage, of a spiralarranged within the elevator-shaft, a spiral traveling with the cage andmovable longitudinally relative to the cage to cause a braking action,and a band-brake for the traveling spiral to cause the longitudinalmovement.

7. In an elevator-brake, the combination with the cage, of a fixedspiral arranged within the elevator-shaft, a spiral traveling with thecage, and movable longitudinally relative to the cage to cause a brakingaction, a band-brake for the traveling spiral to cause the longitudinalmovement, and a hand-operated mechanism connected to the bandbrake.

8. In an elevator-brake, the combination with the cage, of a pair ofspirals arranged in IOO TIO

the elevator-shaft on opposite sides of the cage, a pair of spiralstraveling With the cage, one on each of the shaft-spirals and movablelongitudinally relativelyto the cage to cause a braking action,band-brakes for the spirals to cause the longitudinal movements, andmeans for simultaneously operating both band-brakes 9. In anelevator-brake, the combination with the elevator-shaft, a door at alanding in the shaft, and the cage, of a pair of spirals, one arrangedin the shaft and the other traveling With the cage, and one of saidspirals being movable, and means operated by an elevator-door when opento brake the movable spiral.

10. In an elevator, the combination of a cage, a tube provided with avertical slot, a spiral arranged Within the tube and connect ed with thecage through the slot, and means Within the tube for causing therotation of the spiral.

11. In an elevator-brake, the combination of a cage, a pair of tubes,one on each side of the cage, and each provided With a vertical slot, as iral arranged Within each of said tubes an connected With the cagethrough the slot, and means Within the tubes for causing the rotation ofthe spirals.

l2. In an elevator-brake, the combination with a cage and its hoistingmechanism, of'a spiral unconnected With the hoisting mechanism andmovable longitudinally on the cage to cause a braking action While thecage is connected to the hoisting mechanism, and a iiXed spiral engagingthe teeth of the traveling spiral in such a manner as to causo therotation of the traveling spiral.

The foregoing speciiication signed this 'l 1th day of July, 1904.

MCCLELLAN FULLENLOVE. In presence of- E. K. PENNEBAKER, ISAAC SHERMAN.

